Poly(urea-formaldehyde) microcapsules containing commercial paraffin: in situ polymerization study

Microcapsules containing Rubitherm® RT-42 paraffin wax (core) and a poly(urea-formaldehyde) shell were prepared by an in situ polymerization. The influence of prepolymerization/polymerization time, the reaction temperature, and the monomers/phase change material (PCM) mass ratio on the encapsulation...

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Bibliographic Details
Published inColloid and polymer science Vol. 296; no. 9; pp. 1449 - 1457
Main Authors Sánchez-Silva, L., Lopez, V., Cuenca, N., Valverde, J. L.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.09.2018
Springer Nature B.V
Subjects
Aldehydes
Characterization and Evaluation of Materials
Chemical composition
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Energy storage
Food Science
Formaldehyde
Fourier transforms
Infrared spectroscopy
Microencapsulation
Monomers
Morphology
Nanotechnology and Microengineering
Optimization
Organic chemistry
Original Contribution
Paraffin wax
Particle size distribution
Phase change materials
Physical Chemistry
Physical properties
Polymer Sciences
Polymerization
Reaction time
Scanning electron microscopy
Soft and Granular Matter
Storage systems
Thermal energy
Urea formaldehyde resins
Phase change materials
Microcapsules
Poly(urea-formaldehyde)
In situ polymerization
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Summary:Microcapsules containing Rubitherm® RT-42 paraffin wax (core) and a poly(urea-formaldehyde) shell were prepared by an in situ polymerization. The influence of prepolymerization/polymerization time, the reaction temperature, and the monomers/phase change material (PCM) mass ratio on the encapsulation process and the physical properties of the resulting microcapsules was studied. The morphology, chemical composition, and particle size distribution of the microcapsules were characterized by differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR). It was found that the structure of the generated poly(urea-formaldehyde) microcapsules strongly depended on the reaction time. The content of encapsulated Rubitherm® RT-42 increased with increasing reaction temperature until a limit, ranging the optimum reaction temperature from 60 to 70 °C. Finally, it was found that the optimal monomers/PCM mass ratio was 0.8. The poly(urea-formaldehyde) microcapsules obtained containing the RT-42 paraffin can be used as thermal energy storage systems.
ISSN:0303-402X
1435-1536
DOI:10.1007/s00396-018-4365-0